Washington (CNN) - Timothy Kurek’s motivation to spend a year pretending to be gay can be boiled down to a simple conviction: it takes drastic change to alter deeply held religious beliefs.

The experiment began after a lesbian friend opened up to Kurek about being excommunicated by her family. All Kurek, an avowed evangelical Christian, could think about, he says, “was trying to convert her.”

He was quickly disgusted by his own feelings, more pious than humane.

In fact, Kurek was so disgusted by his response to his friend that he decided to do something drastic. Living in Nashville, Tennessee, he would pretend to be gay for a year. The experiment began on the first day of 2009; Kurek came out to his family, got a job as a barista at a gay café and enlisted the help of a friend to act as his boyfriend in public.

The experience – which stopped short of Kurek getting physically intimate with other men - is documented in Kurek’s recent book “The Cross in the Closet,” which has received international attention, landed him on ABC’s "The View" and elicited some biting criticism.

The book is the latest entry on a growing list of experiential tomes revolving around religion. They include Rachel Held Evans’ recent “A Year of Biblical Womanhood,” in which the author follows the Bible’s instructions on women’s behavior and Ed Dobson’s “The Year of Living Like Jesus,” which had the author “eat as Jesus ate. Pray as Jesus prayed. Observe the Sabbath as Jesus observed.”

For Kurek, his year as a gay man radically changed his view of faith and religion, while also teaching him “what it meant to be a second class citizen in this country.”

A yearlong lie

For years, Kurek says, the only life he had was “his church life.” Being an evangelical Christian was his identity.

He was home-schooled until seventh grade, almost all of his friends were from church and his social life was a nightly string of faith-based events, from church sports to a Christian Cub Scout troop. “It was the only thing I was used to doing,” said Kurek, who attended Liberty University, the largest evangelical university in the world, before dropping out after freshman year.

Kurek grew up in an “independent Baptist church.” “We were evangelical,” he said, “but we were more conservative than evangelical, too.”

His churchy lifestyle led to some deeply held views about homosexuality. Most evangelical churches condemn homosexuality as sinful. Many rail against certain gay rights, like gay marriage.

“I had been taught to be wary of gays,” Kurek writes of his beliefs pre-experiment. “They were all HIV positive, perverts and liberal pedophiles.”

Those views began to be challenged in 2004, when he first encountered Soulforce, a lesbian, gay, bisexual and transgender civil rights group, on Liberty’s campus. The group made the school an important stop on its cross-country tour targeting colleges that they alleged treated LGBT people unfairly.

Kurek was struck by what he had in common with the protesters at Liberty. “It really impressed me that people who were coming to push their agenda were able to do it and be so nice about it,” he said.

His doubt about Christianity’s condemnation of homosexuality, Kurek writes, was “perfected” in 2008, when a close friend recounted the story of coming out to her family and being disowned.

“I betrayed her, then,” writes Kurek. “It was a subtle betrayal, but a cruel one: I was silent.”

His recognition of that betrayal, he writes, led him to believe that “I needed to come out of the closet as a gay man.”

“I believe in total immersion,” Kurek says in an interview. “If you are going to walk in other people’s shoes, then you are going to need to walk in your shoes.”

To ensure the purity of his project, Kurek says, he had to lie to his deeply religious family about being gay, something that troubled him throughout the year.

“I felt like they loved me but they didn’t know how to deal with me,” he says. “They didn’t understand how to handle having a gay brother or sibling.”

In the book, Kurek recounts learning that his mother wrote in her journal that she would rather have been diagnosed with cancer than have a gay son. That experience and others left Kurek feeling outcast by people he loved, confused about his new life and conflicted about past religious beliefs.

Kurek was living a lie. And even though he was conflicted by his family’s reaction to his new lifestyle, he was longing to be honest with them.

The response

It’s no surprise that the “The Cross in the Closet,” has spurred strong reaction, especially from the LGBT community.

“I feel for the gay community of Nashville, and for every person who trusted Kurek enough to flirt with him, hang out with him, and confide in him about their lives,” wrote Amy Lieberman on the blog Feministing. “If I were in that community, I would feel so betrayed right now.”

In a Huffington Post blog post titled “Pretending To Be Gay Isn’t The Answer,” Emily Timbol, a religion blogger, expressed a similar opinion: “What's sad is that every interaction Timothy had during his year pretending was fake.”

“He was welcomed under false pretenses, acting like someone who understood the struggle that his LGBT friends faced,” she wrote. “He did not.”

But Kurek says that that was not his aim. “This isn't a book about being gay, I could not write that book, I am not qualified,” he writes. “What this is about is the label of gay and how that label affected me personally.”

Throughout the book, Kurek emphasizes that distinction. While much of “The Cross in the Closet” is about the struggle to understand the gay community, which he tries to address by enlisting a friend to act as his boyfriend, much of it addresses how his former church’s community – and family – reacted to his new lifestyle.

“I am actually not friends or in contact at all with 99.99% of the people that I grew up with or the churches that I grew up with,” Kurek says.

Kurek says he isn’t opposed to interacting with people from his "former" life. When he has run into members of his old church, he said he generally has quick, cordial conversations and moves on.

But some of the new distance is by choice. When Kurek’s mother told a friend in her church that her son was gay, the person said Kurek’s sexuality could jeopardize his mother's standing in the church.

The evangelical community has remained fairly mum throughout much of the reaction; most responses have come from Christians who are in some way connected to the LGBT community.

The change

Though Kurek goes to church less now, primarily because he has yet to find one that feels like “home,” he says he feels more religious “in the biblical definition of religion.” He still considers himself a Christian, although no longer evangelical, and says he is interested in attending the Evangelical Lutheran Church in America in the future.

Kurek quotes James 1:27 from the New Testament: “Religion that God our Father accepts as pure and faultless is this: to look after orphans and widows in their distress and to keep oneself from being polluted by the world.”

There’s no mention of organized religion in passages like that, and Kurek says it’s the institutions of religion that worry him most today. He talks about his once robust church life as a distant memory.

Living as a gay man jaded him to religion, he says, though he has not surrendered all of his former beliefs. Yes, Kurek says, he is struggling with certain points of his theology, but he has been looking for the right church. “I am trying to figure out what place in the body of Christ I fit in,” he said.

As for his original goal, to radically change who he was, Kurek says mission accomplished. He says he has conquered his prejudices of the LGBT community and is happy with the person he has become.

“If anybody had told me back then who I would be or what I would believe now,” Kurek said, “I would have thought they were completely insane.”

For example, Kurek now thinks homosexuality is completely acceptable.

His family is happy to know that he is not gay, says Kurek. He has a new set of friends. And he lives in Portland, Oregon, where he moved shortly after finishing his experimental year.

The author plans to donate part of the proceeds from his book to help LGBT homeless youth who have been rejected by their families.

He is now at work on a book proposal for a follow-up to “The Cross in the Closet.” The book will be about the years after his experiment, transitioning back to honest living while continuing to engage the LGBT community.

“I want to tell more stories,” he says “and humanize the people who Christians always want to look at as labels.”

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The CNN Belief Blog covers the faith angles of the day's biggest stories, from breaking news to politics to entertainment, fostering a global conversation about the role of religion and belief in readers' lives. It's edited by CNN's Daniel Burke with contributions from Eric Marrapodi and CNN's worldwide news gathering team.